Alert archive / Arkansas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 151, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 20, 2001, 7:31 PM CDT for Benton County, Washington County, Arkansas. It was in force for 44 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- May 20, 2001, 7:31 PM CDT (00:31 UTC)
- Expired
- May 20, 2001, 8:15 PM CDT
- In force
- 44 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Benton County, AR, Washington County, AR
The radar
The Western Arkansas radar (KSRX), 112 km from the middle of the area, began a volume at 00:32 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 20, 7:45 PM CDT | Hail 1 | Bentonville, AR | |
| May 20, 7:52 PM CDT | Thunderstorm Wind | Rogers, AR | Thunderstorms winds blew down many large tree limbs and trees west of Rogers. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 6:00 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 0.5 hours before the alert went out and 77 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1724 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 670 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 178 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 8.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 210031 SVRTUL ARC007-143-210115- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 731 PM CDT SUN MAY 20 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BENTON COUNTY IN NORTHWEST ARKANSAS NORTHERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS * UNTIL 815 PM CDT * AT 731 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES NORTHWEST OF TONTITOWN...MOVING NORTHEAST AT 35 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...TONTITOWN... SPRINGDALE...GARFIELD...WAR EAGLE...CAVE SPRINGS...HIGHFILL... SPRINGTOWN...LOWELL...ROGERS AND BENTONVILLE. HAIL TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. LAT...LON 3631 9451 3616 9431 3618 9392 3650 9385
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 20, 5:40 PM CDT, 1 hour 51 minutes earlier.
Area forecast discussion, May 20, 5:40 PM CDT, 1 hour 51 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 540 PM CDT SUN MAY 20 2001 UPDATED FORECAST TO INCLUDE HEADLINE FOR SEVERE TSTORM WATCH NUMBER 256. STILL WAITING ON POSSIBLE TOR WATCH FOR WESTERN AR...WILL HAVE TO UPDATE AGAIN WHEN AND IF IT COMES OUT. INCREASED SEVERE THREAT WORDING IN SEVERAL ZONES GROUPS. NEW STORMS GOING UP AND INCREASING NOW...ONE IN EAST TULSA COUNTY AND THE ONE IN CREEK COUNTY. OTHER STORMS GOING UP IN HUGHES AND PONTOTOC COUNTIES COULD ALSO BECOME QUITE SEVERE AS IT TAPS EXTREME INSTABILITY. FCSTID = 26 .TSA... AR...NONE. OK...NONE.
In the hours before
Local storm report, May 20, 5:52 PM CDT, 1 hour 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
552 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0548 PM VIVIAN OK 1.75 INCH HAIL
05/20/01 MCINTOSH
0550 PM 2 N BROKEN ARROW OK 1 INCH HAIL
05/20/01 TULSALocal storm report, May 20, 6:08 PM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
608 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
K0548 PM VIVIAN OK 1.75 INCH HAIL
05/20/01 MCINTOSH
0550 PM 2 N BROKEN ARROW OK 1 INCH HAIL
05/20/01 TULSALocal storm report, May 20, 6:11 PM CDT, 1 hour 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
611 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0556 PM 2 N FAIRFAX OK 1 INCH HAIL
05/20/01 OSAGE REPORTED BY POLICE DEPT
0607 PM SAND SPGS OK 1.75 INCH HAIL
05/20/01 TULSA AMATEUR RADIO REPORT
mLocal storm report, May 20, 6:14 PM CDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
614 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
053r5 PM 7 SW BURBANK OK 67 MPH TSTM GUST
05/20/01 OSAGE MESONET MEASUREMENTLocal storm report, May 20, 6:34 PM CDT, 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
634 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 PM 1 S PAWHUSKA OK TORNADO
05/20/01 OSAGE AMATEUR RADIO REPORTLocal storm report, May 20, 7:28 PM CDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
728 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0639 PM 5 W PAWHUSKA OK 65 MPH TSTM GUST
05/20/01 OSAGE ESTIMATE BY AMATEUR RADIO
0654 PM 1 NW STIGLER OK TORNADO
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM WHITEFIELD OK .75 INCH HAIL
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM 3 WNW STIGLER OK 92 MPH TSTM GUST
05/20/01 HASKELL MESONET MEASUREMENT
0657 PM STIGLER OK TORNADO
05/20/01 HASKELL TV CHASE TEAM REPORTED
20 SECOND TOUCHDOWN
0721 PM VERA OK .88 INCH HAIL
05/20/01 WASHINGTON AMATEUR RADIO REPORT
@ RUKWBCe KDENNWUS54 KTSA 210032
LSRTUL
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
732 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0639 PM 5 W PAWHUSKA OK 65 MPH TSTM GUST
05/20/01 OSAGE ESTIMATE BY AMATEUR RADIO
0654 PM 1 NW STIGLER OK TORNADO
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM WHITEFIELD OK .75 INCH HAIL
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM 3 WNW STIGLER OK 92 MPH TSTM GUST
05/20/01 HASKELL MESONET MEASUREMENT
0657 PM STIGLER OK TORNADO
05/20/01 HASKELL TV CHASE TEAM REPORTED
20 SECOND TOUCHDOWN
0721 PM VERA OK .88 INCH HAIL
05/20/01 WASHINGTON AMATEUR RADIO REPORTThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 7:42 PM CDT | Tornado Warning | TSA | Crawford, Sebastian | 63 min |
| May 20, 7:50 PM CDT | Tornado Warning | TSA | Benton, Carroll | 40 min |
| May 20, 8:06 PM CDT | Tornado Warning | TSA | Madison | 24 min |
| May 20, 8:15 PM CDT | Tornado Warning | TSA | Franklin | 30 min |
| May 20, 8:30 PM CDT | Severe Thunderstorm Warning | TSA | Carroll | 45 min |
| May 20, 8:36 PM CDT | Tornado Warning | TSA | Carroll | 39 min |
| May 20, 8:38 PM CDT | Severe Thunderstorm Warning | TSA | Madison | 37 min |
| May 20, 8:41 PM CDT | Tornado Warning | TSA | Franklin | 34 min |
| May 20, 8:45 PM CDT | Tornado Warning | TSA | Sebastian | 45 min |
| May 20, 11:07 PM CDT | Severe Thunderstorm Warning | TSA | Crawford, Sebastian | 38 min |
| May 20, 11:21 PM CDT | Flash Flood Warning | TSA | Sebastian | 84 min |
| May 20, 11:44 PM CDT | Severe Thunderstorm Warning | TSA | Sebastian | 46 min |
| May 21, 12:23 AM CDT | Severe Thunderstorm Warning | TSA | Sebastian | 52 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.